CN1566665A - Connection structure of piston and connecting rod for hermetic compressor - Google Patents
Connection structure of piston and connecting rod for hermetic compressor Download PDFInfo
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- CN1566665A CN1566665A CN 03148017 CN03148017A CN1566665A CN 1566665 A CN1566665 A CN 1566665A CN 03148017 CN03148017 CN 03148017 CN 03148017 A CN03148017 A CN 03148017A CN 1566665 A CN1566665 A CN 1566665A
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Abstract
The invention relates to a linking structure between piston and connecting rod of closed type compressor. In the piston making straight reciprocating motion in the cylinder, a back-end opened piston chamber is arranged. A piston pin is arranged in the piston chamber, and two ends of the piston pin are inserted into setting holes. The piston pin is connected to the connecting rod and piston by passing through the small end diameter. Between the inner round surface of the connecting rod and the outer round surface of the piston, defined clearances are arranged with lubricating oil in it. For connecting the clearances and the piston chamber, lubricating grooves are formed. The invention can prevent set-up noise generated by the lubricating oil cavitation, or connection rod movement caused by the lubricating oil pressure.
Description
Technical field
The present invention relates to a kind of compressor of mechanical engineering field, particularly about the piston of a kind of hermetic type compressor of the linkage structure that connects piston and connecting rod and the linkage structure (Aconnecting structure of piston and connecting rod for hermeticcompressor) of connecting rod.
Background technique
See also Fig. 1, shown in Figure 2, Fig. 1 is the internal structure schematic representation of the hermetic type compressor of existing connecting rod mode, and Fig. 2 is the piston of existing hermetic type compressor and the linkage structure sectional drawing of connecting rod.
As shown in Figure 1, 2, compressor has the seal container 1 that is made of upper container 1t and bottom container 1b, and in the inside of above-mentioned seal container 1 frame 2 is installed.On above-mentioned frame 2, be fixed with stator 3, and above-mentioned frame 2 is positioned at the inside of seal container 1 and passes through spring 2S and support.
On above-mentioned frame 2, be equipped with and connect its central crankshaft 5.On above-mentioned crankshaft 5, be formed with rotor 4, and can by with the mutual electric field action of said stator 3, together rotate with above-mentioned rotor 4.
The upper end of above-mentioned crankshaft 5 is formed with the centrifugal fin 5b that deviates from above-mentioned crankshaft 5 rotating centers, and in addition, the opposite side at above-mentioned centrifugal fin 5b is formed with counterweight 5c.In the lower end of above-mentioned crankshaft 5,, the lubricant oil L that will be positioned at bottom container 1b bottom surface is provided with propeller cavitation 5d for sucking by the lubricating oil path 5a that is formed on crankshaft 5.
In addition, with above-mentioned frame 2 portion within it of being formed with have pressing chamber 6 ' cylinder 6, and above-mentioned pressing chamber 6 ', be formed with the piston 7 that the centrifugal fin 5b by connecting rod 8 and above-mentioned crankshaft 5 links together.Above-mentioned piston 7 and connecting rod 8 form the inside that is arranged on above-mentioned piston 7, and are linked together by wrist pin 7p in the 7c of piston chamber that opening forms to the back-end.Just, the top end diameter 8s of above-mentioned connecting rod 8 is connected on the wrist pin 7p that is formed in the above-mentioned 7c of piston chamber, and can rotate.Between the top end diameter 8s of above-mentioned wrist pin 7p and connecting rod 8, be formed with gap c here.
Front end in said cylinder portion 6, be formed with can control flow into or discharge above-mentioned pressing chamber 6 ' the valve member 9 of condensing agent.Mark 10 among Fig. 1 is a top cover, and mark 11 is an absorbing silencer, and mark 12 is the suction pipes that condensing agent are sent to seal container 1 inside, and mark 13 is the discharge tubes that compressed condensing agent are discharged to the compressor outside.
Above-mentioned rotor 4 by with the mutual electric field action of stator 3, together rotate with integrally formed above-mentioned crankshaft 5.Rotation along with above-mentioned crankshaft 5, the centrifugal fin 5b that deviates from above-mentioned crankshaft 5 also can and then rotate, and the connecting rod 8 that links together with above-mentioned centrifugal fin 5b can be along with above-mentioned centrifugal fin 5b moves, so that make above-mentioned piston 7 carry out straight reciprocating motion.As mentioned above, by piston 7 in pressing chamber 6 ' interior straight reciprocating motion, compression condensation agent.
But there are the following problems for above-mentioned existing technology:
The top end diameter 8s that is connected the connecting rod 8 on the above-mentioned piston 7 by above-mentioned wrist pin 7c only is rotated in the angular range of regulation above-mentioned wrist pin 7c.Therefore between the top end diameter 8s inner peripheral surface of the outer circumferential face of wrist pin 7c and connecting rod 8, might rub, the lubricant oil L that supply is sucked by above-mentioned crankshaft 5, and carry out lubrication.
But, as shown in Figure 3, above-mentioned connecting rod 8 above-mentioned piston 7 is pushed into pressing chamber 6 ' the compression process of forefront in, be close to the rear end of piston 7 in the middle of the top end diameter 8s of above-mentioned connecting rod 8 and the gap s between the wrist pin 7p, the lubricating oil pressure in the above-mentioned thereupon gap s also can uprise.If therefore the pressure of lubricant oil L sharply rises, can cause cavitation (Cavitation), thereby produce noise.
And, as shown in Figure 3,, can produce lubricant oil L and will flow out power between the s of gap, so the top end diameter 8s of connecting rod 8 will be lifted along with the oily L of s inside, above-mentioned gap rises.And, along with the top end diameter 8s of above-mentioned connecting rod 8 periodically carries out elevating movement towards the length direction of above-mentioned wrist pin 8p, thereby produce noise.
This shows that the piston of above-mentioned existing hermetic type compressor and the linkage structure of connecting rod still have many defectives, and demand urgently further being improved.
The defective that exists for the linkage structure of the piston that solves existing hermetic type compressor and connecting rod, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, therefore how to found and a kind ofly have that volume is little, cost is low concurrently and can have the piston of hermetic type compressor of comprehensive adjustment function and the linkage structure of connecting rod when using, just become the current industry utmost point to need improved target.
Because the defective that the linkage structure of the piston of above-mentioned existing hermetic type compressor and connecting rod exists, the inventor is based on abundant practical experience and professional knowledge, actively studied innovation, through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
Main purpose of the present invention is, overcome the defective that the linkage structure of the piston of existing hermetic type compressor and connecting rod exists, and provide a kind of piston of hermetic type compressor of new structure and the linkage structure of connecting rod, technical problem underlying to be solved be make the lubricant oil that connects piston and the piston chamber inside of connecting rod mobile more freely, harmony.
Purpose of the present invention and to solve its technical problem underlying be to adopt following technological scheme to realize.The piston of a kind of hermetic type compressor that proposes according to the present invention and the linkage structure of connecting rod, it comprises: the pressing chamber at cylinder internal carries out straight reciprocating motion, and its inside has the piston of the piston chamber of opening to the back-end; Accept power from the crankshaft of rotation, and be converted to the connecting rod of the straight reciprocating motion of above-mentioned piston; Connect connecting rod, and and the inner peripheral surface of the top end diameter of above-mentioned connecting rod between form predetermined gap, and its two ends are installed in above-mentioned piston chamber inside, and connect above-mentioned piston and connecting rod, the wrist pin that can also rotate; And for lubricant oil is flowed with the top end diameter of above-mentioned connecting rod and the oil groove of gap between the wrist pin and external communications.
The object of the invention to solve the technical problems can also be further achieved by the following technical measures.
The piston of aforesaid hermetic type compressor and the linkage structure of connecting rod, the bottom surface of the piston chamber that the top end diameter that wherein said oil groove formation is arranged on above-mentioned connecting rod is close to;
The piston of aforesaid hermetic type compressor and the linkage structure of connecting rod, wherein said oil groove form below the top end diameter that is arranged on the above-mentioned connecting rod of being close to the bottom surface of above-mentioned piston chamber;
The piston of aforesaid hermetic type compressor and the linkage structure of connecting rod, wherein said oil groove form symmetrically and are arranged on and corresponding position, the top and bottom of above-mentioned connecting rod;
The piston of aforesaid hermetic type compressor and the linkage structure of connecting rod, wherein said oil groove connects the top end diameter of above-mentioned connecting rod.
Possess the linkage structure according to the piston and the connecting rod of hermetic type compressor of the present invention of said structure, on the gap between connecting rod and the wrist pin, can avoid taking place the rapid change of oil pressure, thus startup noise that can minimum compressor.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technological scheme as can be known, in order to reach aforementioned goal of the invention, according to the linkage structure of the piston of hermetic type compressor of the present invention and connecting rod by forming as the bottom: possesses the pressing chamber that has in cylinder and carry out straight reciprocating motion, and its inside has the piston of the piston chamber of opening to the back-end; Accept power from the crankshaft of rotation, and be converted to the connecting rod of the straight reciprocating motion of above-mentioned piston; And form predetermined gap between the top end diameter inner face of above-mentioned connecting rod, connect connecting rod, and its two ends are arranged on above-mentioned piston chamber inside, thereby realize connecting above-mentioned piston and connecting rod, the wrist pin that enables to rotate; Be communicated with the top end diameter of above-mentioned connecting rod and the gap between the wrist pin, thereby realize the oil groove that flows of lubricant oil.
As mentioned above, according to the linkage structure of the piston and the connecting rod of hermetic type compressor of the present invention, the inner oil groove with piston chamber in the gap between the inner peripheral surface that has formed the outer circumferential face that connects wrist pin and connecting rod on the position that top end diameter contacted of piston and connecting rod.
Therefore can suitably keep the lubricating oil pressure of inside, above-mentioned gap, thereby can prevent the cavitation of lubricant oil, and can reduce the startup noise.
And,, thereby can prevent when driven compressor that the top end diameter of the connecting rod that links together with wrist pin is along with the phenomenon of wrist pin lifting because of suitably keeping the lubricating oil pressure of inside, above-mentioned gap, and can reduce to start noise.
In addition, oil groove is formed on the piston symmetrically, therefore when built-up piston and connecting rod, need not considers direction, thereby can improve the workability of assembly working.
In sum, the piston of the hermetic type compressor of special construction of the present invention and the linkage structure of connecting rod, have above-mentioned many advantages and use value, no matter it structurally or bigger improvement is all arranged on the function, is had large improvement technically, and has produced handy and practical effect, and has the effect of enhancement really, thereby being suitable for practicality more, and not seeing have similar structural design to publish or use in like product, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, below with preferred embodiment of the present invention and conjunction with figs. describe in detail as after.
The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 is the internal structure sectional drawing of existing common hermetic type compressor.
Fig. 2 is the piston of existing hermetic type compressor and the linkage structure sectional drawing of connecting rod.
Fig. 3 is the starting state schematic representation of explanation prior art problem points.
Fig. 4 is the piston of hermetic type compressor of the present invention and linkage structure embodiment's schematic representation of connecting rod.
Fig. 5 is the piston rear view among the embodiment shown in Figure 4.
Fig. 6 is an another kind of embodiment's of the present invention sectional drawing.
1 ... seal container 1t ... upper container
1b ... bottom container 2 ... frame
4 ... rotor 5 ... crankshaft
5a ... oil circuit 5b ... centrifugal fin
6 ... cylinder 6 ' ... pressing chamber
7 ... piston 7c ... piston chamber
7p ... wrist pin 8 ... connecting rod
8s ... top end diameter 9 ... valve member
10 ... top cover 11 ... absorbing silencer
12 ... suction pipe 13 ... discharge tube
30 ... cylinder 32 ... pressing chamber
40 ... piston 42 ... piston chamber
43 ... hole 45 is set ... wrist pin
50 ... connecting rod 52 ... top end diameter
60 ... oil groove 60 ' ... oil groove
C ... gap S ... gap
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, the piston of the hermetic type compressor that foundation the present invention is proposed and its embodiment of linkage structure, structure, feature and the effect thereof of connecting rod, describe in detail as after.
See also Fig. 4, shown in Figure 5, Fig. 4 is the piston of hermetic type compressor of the present invention and linkage structure embodiment's schematic representation of connecting rod, and Fig. 5 is the piston rear view among the embodiment shown in Figure 4.The piston of the hermetic type compressor of preferred embodiment of the present invention and the linkage structure of connecting rod, it comprises: the pressing chamber at cylinder internal carries out straight reciprocating motion, and its inside has the piston of the piston chamber of opening to the back-end; Accept power from the crankshaft of rotation, and be converted to the connecting rod of the straight reciprocating motion of above-mentioned piston; Connect connecting rod, and and the inner peripheral surface of the top end diameter of above-mentioned connecting rod between form predetermined gap, and its two ends are installed in above-mentioned piston chamber inside, and connect above-mentioned piston and connecting rod, the wrist pin that can also rotate; And for lubricant oil is flowed with the top end diameter of above-mentioned connecting rod and the oil groove of gap between the wrist pin and external communications.
Shown in Fig. 4,5, cylinder 30 inside that are arranged on the frame are formed with pressing chamber 32.In the inside of above-mentioned pressing chamber 32, carry out the compression of fluid.And the inlet at above-mentioned pressing chamber 32 is formed with the valve member 9 that the control fluid flow into the outside of above-mentioned pressing chamber 32.
Piston 40 is arranged on the inside of above-mentioned pressing chamber 32, and carries out straight reciprocating motion in pressing chamber 32 inside, thus compressed fluid.Above-mentioned piston 40 inside are formed with piston chamber 42.Above-mentioned piston chamber 42 forms to the open rearward end of piston 40, form it on be provided with installation wrist pin 45 hole 43 is set.Above-mentioned wrist pin 45 connects piston 40 and the following connecting rod that promptly will illustrate 50.
Connecting rod 50 is converted into the straight reciprocating motion of piston 40 with rotatablely moving of crankshaft, and the centrifugal fin of one end and crankshaft links together, and the other end is that top end diameter 52 links together with piston 40 by above-mentioned wrist pin 45.That is to say that above-mentioned wrist pin 45 connects the central authorities of above-mentioned top end diameter 52, and the two ends of above-mentioned wrist pin 45 are installed in above-mentioned the setting in the hole 43, thereby connect piston 40 and connecting rod 50.
At this moment,, only in the angular range of regulation, rotate, thereby between the inner peripheral surface of the outer circumferential face of above-mentioned wrist pin 45 and top end diameter 52, form predetermined gap s because of the top end diameter 52 of above-mentioned connecting rod 50 is the center with above-mentioned wrist pin 45.And lubricant oil is fed to above-mentioned gap s.
In addition, be formed with oil groove 60 in the bottom surface of above-mentioned piston chamber 42.Above-mentioned oil groove 60 is elongated sagged shape, and it has the effect that is communicated with above-mentioned gap s and above-mentioned piston chamber 42 inside.At this moment, above-mentioned connecting rod 50 is arranged in the above-mentioned piston chamber 42, is close to the bottom surface of piston chamber 42 because of gravity makes its top end diameter 52.And the inside of the bottom of above-mentioned gap s and piston chamber 42 links together by above-mentioned oil groove 60.
In the above-described embodiments, above-mentioned oil groove 60 also can be arranged on the top of above-mentioned piston chamber 42.That is to say that oil groove 60 is formed on the bottom surface and the end face of above-mentioned piston chamber 42 symmetrically.This be because, when above-mentioned oil groove 60 is formed on the top of piston chamber 42, work as compressor start, above-mentioned connecting rod 50 can together slide with state and the wrist pin 45 that rises to above-mentioned wrist pin 45 tops.Simultaneously also be when connecting piston 40, can not consider direction, carry out assembly working with connecting rod 50.
Fig. 6 is the sectional drawing of another embodiment of the present invention.According to the content of present embodiment, the oil groove 60 of gap s between the top end diameter 52 of the outer circumferential face of wrist pin 45 and connecting rod 50 and piston chamber 42 ' the be formed on upper-end surface and the lower end surface of above-mentioned top end diameter 52 will be connected.Above-mentioned oil groove 60 ' preferably with radial upper-end surface and the lower end surface that is formed on above-mentioned top end diameter 52.
Though accompanying drawing is diagram not, also oil groove can be arranged on other certain position except the upper-end surface of the top end diameter of above-mentioned connecting rod or lower end surface, the inside of itself and above-mentioned top end diameter is connected.
Below, describe the effect of the linkage structure of piston with hermetic type compressor of the present invention of structure as mentioned above and connecting rod in detail:
Along with the driving of compressor, the motor effect because of constituting with rotor and stator is rotated crankshaft.The centrifugal fin that is formed at above-mentioned crankshaft is that benchmark is rotated with the rotating center of crankshaft, and the connecting rod 50 that is connected above-mentioned centrifugal fin makes piston 40 carry out straight reciprocating motion in pressing chamber 32.
At this moment, the top end diameter 52 of above-mentioned connecting rod 50 and piston 40 are linked together by wrist pin 45 in the inside of piston chamber 42, and slide mutually between top end diameter 52 inner peripheral surfaces of the outer circumferential face of above-mentioned wrist pin 45 and connecting rod 50.And lubricant oil is fed to above-mentioned gap s.And be supplied to above-mentioned gap s, and disperse by the lubricant oil that inside was drawn into of crankshaft.
When above-mentioned piston 40 carries out straight reciprocating motion in the inside of above-mentioned pressing chamber 32, because of each roundtrips, take place between above-mentioned piston 40 and the connecting rod 50 toward the power of other direction.For example, in compression stroke, above-mentioned connecting rod 50 is pushing away piston 40, and above-mentioned piston 40 is pushed to the direction of connecting rod 50 because of pressing chamber 32 pressure inside.
Thereupon, among the gap s between above-mentioned wrist pin 45 and top end diameter 52, the rearward end of piston 40 relatively can narrow down, thereby the lubricating oil pressure of s inside, gap can rise.When the lubricating oil pressure of s inside, above-mentioned gap rose, lubricant oil can be by above-mentioned oil groove 60 ' spill out.Therefore, can avoid taking place cavitation that the rising because of the lubricating oil pressure of s inside, above-mentioned gap causes or top end diameter 52 phenomenon along with wrist pin 45 liftings.
In addition, as shown in Figure 6, when the lubricating oil pressure of s inside, above-mentioned gap rises, the oil groove 60 of upper-end surface that is formed at above-mentioned top end diameter 52 or lower end surface ' in the middle of, the oil groove 60 by being close to piston chamber 42 ' flow out to piston chamber 42 inside.
The technological innovation of the piston of the hermetic type compressor of the present invention that above-mentioned structure like this constitutes and the linkage structure of connecting rod all has many saving graces for technician of the same trade now, and the progressive that possesses skills really.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention above any simple modification, equivalent variations and modification that embodiment did.
Claims (5)
1, the linkage structure of a kind of piston of hermetic type compressor and connecting rod, it is characterized in that: it comprises
Pressing chamber at cylinder internal carries out straight reciprocating motion, and its inside has the piston of the piston chamber of opening to the back-end;
Accept power from the crankshaft of rotation, and be converted to the connecting rod of the straight reciprocating motion of above-mentioned piston;
Connect connecting rod, and and the inner peripheral surface of the top end diameter of above-mentioned connecting rod between form predetermined gap, and its two ends are installed in above-mentioned piston chamber inside, and connect above-mentioned piston and connecting rod, the wrist pin that can also rotate; And
For lubricant oil is flowed with the top end diameter of above-mentioned connecting rod and the oil groove of gap between the wrist pin and external communications.
2, the linkage structure of the piston of hermetic type compressor according to claim 1 and connecting rod is characterized in that wherein said oil groove forms the bottom surface of the piston chamber that the top end diameter that is arranged on above-mentioned connecting rod is close to.
3, the linkage structure of the piston of hermetic type compressor according to claim 1 and connecting rod is characterized in that wherein said oil groove forms below the top end diameter that is arranged on the above-mentioned connecting rod of being close to the bottom surface of above-mentioned piston chamber.
4 according to the piston of claim 2 or 3 described hermetic type compressors and the linkage structure of connecting rod, it is characterized in that wherein said oil groove forms symmetrically to be arranged on and corresponding position, the top and bottom of above-mentioned connecting rod.
5, the linkage structure of the piston of hermetic type compressor according to claim 1 and connecting rod is characterized in that wherein said oil groove connects the top end diameter of above-mentioned connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03148017 CN1566665A (en) | 2003-06-26 | 2003-06-26 | Connection structure of piston and connecting rod for hermetic compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03148017 CN1566665A (en) | 2003-06-26 | 2003-06-26 | Connection structure of piston and connecting rod for hermetic compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1566665A true CN1566665A (en) | 2005-01-19 |
Family
ID=34472152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03148017 Pending CN1566665A (en) | 2003-06-26 | 2003-06-26 | Connection structure of piston and connecting rod for hermetic compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1566665A (en) |
-
2003
- 2003-06-26 CN CN 03148017 patent/CN1566665A/en active Pending
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